Alright, I guess it's a trend, so here goes. First, there are a lot of Alchemists in the guild so I'm no longer the only one providing this stuff. Many of those Alchemists are also Elixir masters, so there are a lot of people that can proc extras.

Of note is the enormous gap in progression from 425-435. Pretty much the only effective way to get to 435 (and learn the major flasks) is to transmute meta gems, and those are pretty expensive. On the plus side, you get lots of metas in your inventory for when you need them later, and there's no cooldown.

Below is the complete list of Northrend Alchemy recipes, with benefits and mats. An item marked with D is a discovery, either from Northrend Alchemy Research or transmutes.

ResearchNorthrend Alchemy Research can be performed every 3 days for a moderate amount of herbs. It discovers a random recipe and creates 1-3 flasks, elixirs, or potions of a random type. It is the only way to discover new potions or elixirs. (Note: the chance to discover is 100%, so if you don't discover something, there's nothing left and it's pointless to keep trying.)
Titanium and Eternal transmutes (but not metas) have a chance to proc transmutation discoveries.

PassiveMixology - You receive an increased effect and duration when you drink any elixir or flask you are able to make. This is anywhere from 25-75% increased effect depending on the elixir/flask consumed, and always exactly double the duration.

Flask Policy
If you intend to be a regular customer, as opposed to trading for mats or other services, I will have to charge a nominal fee of 25g per flask. At the moment, I'm good on herbs, but Frost Lotus donations are always welcome and will get you a free flask. Lichbloom is also appreciated.

I am happy to hand out most potions or elixirs in moderate quantities (no more than five), no tips required, as long as I have mats.

I'm a max level Elixir Master and can make all of the above along with Elixir of Defense for the tanks. I've been getting heaps of Frost Lotus, but always accept Icethorn, Fire Leaf, and Eternal Lifes.

So, I was looking at updated flask prices, and apparently either my math skills or my memory were severely impaired when I wrote the original post. Therefore I'm dropping the "price" of flasks I create to 25g. Thanks to everyone who's donated mats. Based on what I've seen of demand, though, it's the Endless Rage ones that people really want, and they have that annoying Fire Leaf requirement. So there will always be a limited supply. Frost Wyrm flasks are much easier.

Im at 433 Alchemy presnetly, but getting those last two points is proving to be a bastard since the only things that are orange/guaranteed skill-ups are the Skyflare and Earthsiege Diamond transmutes. I've offered it in trade chat a couple of times and managed to get to 433 that way. I figure I'll make at least one of those for myself, provided I can make room in my bank. Looks like I'm gonna be moving more stuff to my bank alt again...

The great enemy of the truth is very often not the lie, deliberate, contrived, and dishonest; but the myth, persistant, persuasive, and unrealistic. Belief in myths allows for the comfort of opinion without the discomfort of thought. ~JFK

So far, I'm having difficulty keeping up my supplies of Lichbloom, as this goes into the two most popular LK flasks (Endless Rage and Frost Wyrm), as well as being used to make Runic Mana Potions and several other useful things.

Lichbloom is all over Storm Peaks and Icecrown, and apparently shares spawn points with Icethorn - specifically, each node will randomly spawn as one of the two. The disparity in usage, however, means that I've got a ton (like 6 stacks) of Icethorn and I keep running out of Lichbloom.

If you need herbs for Inscription, feel free to ask and I'll dump some of my extra Icethorn on you (among others). In return, please keep a look out for Lichbloom.